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Finding the Fourth Proportional to 657.21, 906.68 and 436.28

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Solution

The fourth proportional to 657.21, 906.68 and 436.28 is: 601.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.21 : 906.68 = 436.28 : x
  2. Step 2: Convert to fraction form
    657.21/906.68 = 436.28/x
  3. Step 3: Cross multiply
    657.21x = 906.68 × 436.28
  4. Step 4: Simplify right side
    657.21x = 395,564.17
  5. Step 5: Solve for x
    x = 395,564.17/657.21
  6. Step 6: Final answer
    x = 601.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.